upas (n.)youdaoicibaDictYouDict[upas 词源字典]
legendary poisonous tree of Java, 1783, via Dutch, from Malay upas "poison," in pohun upas "poison tree." As the name of an actual tree (Antiaris toxicaria) yielding poisonous sap, from 1814.[upas etymology, upas origin, 英语词源]